CN115214777A

CN115214777A - Vehicle chassis structure and vehicle

Info

Publication number: CN115214777A
Application number: CN202210344746.9A
Authority: CN
Inventors: 陈强; 贺志杰; 张涛; 张书任; 武文波; 周荣青; 郭贵阳; 陈曦
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-10-21
Anticipated expiration: 2042-03-31
Also published as: CN115214777B; WO2023185438A1

Abstract

The invention provides a vehicle chassis structure and a vehicle. The battery pack shell is provided with a circular frame and a front floor panel connected to the inner side of the frame, and the frame and the front floor panel limit a battery module installation space. And the front end and the rear end of the frame are respectively connected with a connecting piece, and the front auxiliary frame and the rear auxiliary frame are connected with the frame through the connecting pieces corresponding to the ends. According to the vehicle chassis structure, the vehicle chassis is constructed in the form of the integrated battery pack shell, so that the assembly structure below the middle part of a vehicle body is simplified; the connecting piece is arranged, so that the front auxiliary frame and the rear auxiliary frame can be conveniently connected and mounted on the battery shell, and the connection assembly of the vehicle main body structure is facilitated.

Description

Vehicle chassis structure and vehicle

Technical Field

The invention relates to the technical field of vehicle body structures, in particular to a vehicle chassis structure. In addition, the invention also relates to a vehicle.

Background

With the development and popularization of new energy automobiles, the power battery technology of the new energy automobiles is also remarkably improved. The battery pack of the new energy automobile is generally arranged at the bottom of the middle part of the automobile and is positioned below a front floor. The battery pack is generally provided with a bottom tray for carrying components such as a module in the battery pack, and the battery pack is integrally and fixedly mounted on a bottom frame of the vehicle through the bottom tray.

The middle structure of the vehicle body, particularly the frame structure near the battery pack, not only bears the weight of the battery pack, but also protects the battery pack; but also an important support structure of the vehicle, and is required to bear the major weight of the vehicle body, and also to have collision resistance strength to reduce the risk of a side collision from the vehicle.

The existing middle frame structure of the car body is complex in arrangement and comprises a threshold beam, a front floor, a battery pack shell, a threshold reinforcing beam, a seat cross beam and the like. The assembly process is complicated and is not beneficial to improving the assembly efficiency of the whole vehicle. Moreover, current battery pack shell needs the thickness of strict control casing in order to reduce battery pack's whole weight, leads to battery pack shell's protective strength not enough, and thermal-insulated effect is poor, is unfavorable for the inside operating mode temperature control of battery pack.

Moreover, the assembly structure below the middle part of the vehicle body is complex and is formed by assembling a plurality of components such as the threshold beam, the front floor, the battery pack shell, the threshold reinforcing beam and the like, so that the sound insulation performance of the bottom of the vehicle body is reduced, and the improvement of the use experience of the vehicle is not facilitated.

In addition, in current body structure design, often carry out the connection assembly of middle part shell structure and preceding bounding wall crossbeam, preceding cabin longeron, rear portion body structure, sub vehicle frame etc. through many connecting pieces, the assembly connecting piece that relates is more, and assembly process is more complicated, leads to the assembly link to need consume a large amount of work load.

Disclosure of Invention

In view of the above, the present invention is directed to a vehicle chassis structure for facilitating the connection and assembly between a subframe and a middle battery pack structure of a vehicle.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a vehicle chassis structure comprises a battery pack shell which is positioned in the middle and integrated with a vehicle body, and a front auxiliary frame and a rear auxiliary frame which are respectively connected to the front end and the rear end of the battery pack shell; the battery pack shell is provided with a frame which is arranged into a ring shape, and a front floor panel which is connected to the inner side of the frame, the frame and the front floor panel limit the installation space of the battery module, the front end and the rear end of the frame are respectively connected with a connecting piece, and the front auxiliary frame and the rear auxiliary frame are connected with the frame through the connecting pieces corresponding to the ends.

Furthermore, the battery module installation space is located under the front floor panel, a middle channel arranged along the length direction of the vehicle body is arranged on the front floor panel, and two ends of the middle channel are respectively connected with the front end and the rear end of the frame.

Furthermore, a through hole which is arranged along the length direction of the middle channel and is used for a wiring harness and/or a pipeline to pass through is arranged in the middle channel; and/or the front floor panel is lower than the top of the frame, the front end and the rear end of the frame are both provided with grooves, and two ends of the middle channel are respectively and fixedly connected in the grooves corresponding to the middle channel.

Furthermore, a seat mounting beam is arranged on the front floor panel, and the seat mounting beam is connected with the frame and the middle channel respectively.

Further, at least one of the frame, the middle channel and the seat mounting beam is made of an aluminum profile.

Further, the frame is provided with a hollow inner cavity, and a heat and sound insulation material is filled in the inner cavity; and/or the top of the front floor panel is paved with a heat transfer material.

Further, the frame has the straight section part of establishing respectively in both sides, straight section part extends along automobile body length direction, and both sides straight section part constitutes the threshold roof beam in the automobile body.

Further, a reinforcement beam is arranged on the top of the front end of the side frame, the reinforcement beam is arranged along the width direction of the vehicle body, and the reinforcement beam is configured to be arranged corresponding to the tail end of the front cabin longitudinal beam in the vehicle body, so that the front cabin longitudinal beam can form a barrier to move in the rear direction of the vehicle.

Furthermore, the front end and the rear end of the frame are respectively provided with a straight line part extending along the width direction of the vehicle body and inclined parts respectively connected to two sides of the straight line part, and each inclined part is arranged in a mode of outwards inclining along the direction far away from the straight line part; the reinforcing beam includes a middle beam body connected to tops of the straight portions of the front end, and end beam bodies connected to tops of the inclined portions of the front end, respectively.

Furthermore, the top of the end beam body is an inclined plane which is arranged along the direction far away from the middle beam body and is gradually lowered.

Furthermore, the connecting pieces at each end are two connecting pieces which are respectively arranged close to two sides of the frame, and each connecting piece is provided with a vehicle body connecting part which is fixedly connected with a front structure or a rear structure in a vehicle body.

Further, the connecting piece is detachably connected to the frame; and/or the connecting piece is formed by casting aluminum alloy, a plurality of weight reducing cavities are formed in the connecting piece, and reinforcing ribs are arranged in the weight reducing cavities.

Compared with the prior art, the invention has the following advantages:

according to the vehicle chassis structure, the vehicle chassis is constructed in the form of the integrated battery pack shell, so that the assembly structure below the middle part of a vehicle body is simplified; set up the connecting piece between the frame of battery package casing and sub vehicle frame, can conveniently carry out preceding sub vehicle frame and the connection installation of back auxiliary frame on battery package casing, do benefit to connection structure's the design that integrates, and help the connection assembly of vehicle major structure.

In addition, the arrangement of the middle channel in the length direction of the vehicle body can improve the support strength of the vehicle body structure in the longitudinal direction; a through hole is formed in the middle channel and used for distributing wire harnesses, pipelines and the like; the arrangement of the pipeline arrangement structure on the vehicle body can be reduced, and the pipeline arrangement structure has a good protection effect, so that the arrangement condition of the pipeline between the front part and the rear part of the vehicle can be improved.

Another object of the invention is to propose a vehicle having a vehicle chassis structure according to the invention therein.

Compared with the prior art, the vehicle has the technical advantages of the vehicle chassis structure.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention, and the description is given by way of example only and without limitation to the terms of relative positions. In the drawings:

fig. 1 is a schematic perspective view of a vehicle chassis structure according to a first embodiment of the present invention;

fig. 2 is a schematic perspective view of a battery pack case structure according to a first embodiment of the invention;

FIG. 3 is a perspective view of the component of FIG. 2 from a bottom perspective;

FIG. 4 isbase:Sub>A schematic cross-sectional view taken along line A-A in FIG. 2;

fig. 5 is a schematic perspective view of a middle channel according to a first embodiment of the present invention;

FIG. 6 is a top view of a reinforcement beam according to a first embodiment of the present invention;

FIG. 7 is a cross-sectional view of the area indicated by B-B in FIG. 6;

FIG. 8 is a schematic view of the general structure of a vehicle chassis structure in a vehicle body assembly structure according to a first embodiment of the present invention;

FIG. 9 is a schematic view of the components of FIG. 1 with the front and rear structures of the vehicle body removed;

fig. 10 is a schematic perspective view of a connecting member according to a first embodiment of the present invention;

fig. 11 is a schematic perspective view of a connecting member according to a first embodiment of the present invention at a lower front view;

fig. 12 is a schematic perspective view of a connecting member and a rear side from a top perspective according to a first embodiment of the present invention;

description of reference numerals:

1. a frame; 100. a partition plate; 101. dividing a cavity; 12. a straight section portion; 13. a groove; 130. a straight line portion; 131. an inclined portion;

14. a reinforcing beam; 140. a middle beam body; 141. an end beam body; 142. a through hole; 143. a bevel; 144. a cavity;

15. a front floor panel; 16. a battery module installation space; 17. a seat mounting cross member;

18. a connecting member; 180. an auxiliary frame connecting part; 181. a vehicle body connecting portion; 182. installing a sleeve; 183. a weight-reducing cavity; 184. reinforcing ribs; 185. an inner portion; 186. an outer portion; 187. a connecting bolt;

191. a front subframe; 192. a rear auxiliary frame; 193. a front structure; 194. a rear structure;

3. a middle channel; 300. and (6) a via hole.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The present invention relates to a vehicle chassis structure for facilitating the coupling assembly between a sub-frame and a vehicle middle battery pack structure, and an exemplary structure thereof is shown in fig. 1 and 8.

In general, the vehicle chassis structure includes a battery pack case integrated with a vehicle body at a middle portion, and a front sub-frame 191 and a rear sub-frame 192 connected to front and rear ends of the battery pack case, respectively. The battery pack case has a frame 1 formed in a ring shape, and a front floor panel 15 connected to the inner side of the frame 1, and the frame 1 and the front floor panel 15 define a battery module installation space 16. Further, the front and rear ends of the frame 1 are respectively connected with the connecting members 18, and the front subframe 191 and the rear subframe 192 are connected to the frame 1 through the connecting members 18 at the corresponding ends.

Based on the above overall design, as shown in fig. 2 and 3, for the vehicle chassis structure of the present embodiment, as a preferred embodiment, the frame 1 is preferably made of an aluminum profile, and it may be made of an integrally extruded aluminum profile, for example. And the aluminum profile is adopted, so that the processing and the manufacturing are convenient. Moreover, as shown in fig. 4, an inner cavity is also arranged in the frame 1, and the frame 1 made of aluminum profiles is convenient for the arrangement of the inner cavity in the frame 1, so that the battery pack shell structure integrated with the vehicle body as the battery pack shell has the characteristic of light weight, and the protection performance of the frame 1 as the battery pack shell can be improved.

Based on the arrangement of the inner cavity in the frame 1, a plurality of partition boards 100 can be additionally arranged in the inner cavity to divide the inner cavity into a plurality of sub-cavities 101, and as a preferred embodiment, heat-insulating and sound-insulating materials can be filled in each sub-cavity 101. By providing a plurality of partition plates 100 in the inner cavity, the inner cavity is divided into a plurality of sub-cavities 101, which provides a good improvement in the overall strength of the bezel 1. When the frame 1 is used as a body frame, the frame can have good supporting performance and the capability of bearing side impact from a vehicle, and is beneficial to improving the impact resistance and the buffering performance of the frame 1.

The addition of the heat and sound insulation material can further improve the heat insulation and preservation performance of the frame 1 when the frame is used as a battery can shell. Because the inner cavity is of a fully-closed structure, in order to facilitate the addition of the heat and sound insulation material, the heat and sound insulation material is preferably made of a polyurethane foam material. Therefore, the filling hole can be formed in the frame 1, the polyurethane foam material is filled into the inner cavity, operation and implementation are facilitated, and the filling hole is plugged after filling is completed.

It should be noted that the annular arrangement of the frame 1 does not mean that the frame 1 is annular as a whole, but means that the frame 1 is a complete circle. The frame can be rectangular or polygonal with chamfered corners, the structural shape can be flexibly adjusted according to the setting requirement of the middle frame of the vehicle body, and the sectional size and the wall thickness of the frame 1 can be set on the principle that the frame 1 has enough vehicle body supporting strength.

In the present embodiment, the side frame 1 has the straight portions 12 provided on both sides, the straight portions 12 extending in the length direction of the vehicle body, and the straight portions 12 on both sides constitute a rocker beam in the vehicle body. The two sides of the frame 1 are partially arranged to be straight and used as a threshold beam of the vehicle body, so that the whole frame structure below the middle part of the vehicle body can be simplified, and the assembly process of the vehicle is simplified.

In addition, the arrangement of the front floor panel 15 inside the frame 1, which separates the cabin from the battery module installation space 16, not only serves as the front floor of the vehicle body, but also serves as the upper case of the battery pack, and has a good effect on the simplification of vehicle components and the simplification of the vehicle assembly process.

As shown in fig. 1, 2 and 5, in the present embodiment, the vehicle body has a center tunnel 3 arranged along the length direction of the vehicle body, and both ends of the center tunnel 3 are connected to the front end and the rear end of the frame 1, respectively. Due to the design, the overall strength of the frame 1 is enhanced, and the overall strength of the vehicle body frame is enhanced; when the vehicle is collided from the front and the back, the protective effect on the driving cabin and the battery pack can be achieved to a certain degree.

In addition, during the specific implementation, the grooves 13 may be disposed on the top of the front end and the top of the rear end of the frame 1, and the two ends of the middle channel 3 are respectively fixed in the corresponding grooves 13. By arranging the two grooves 13 at the front end and the rear end of the frame 1, the connection strength between the frame 1 and the middle channel 3 can be improved, the middle channel 3 is prevented from protruding above the middle channel 3, and the arrangement of a driving cabin above the middle channel 3 is facilitated.

The middle channel 3 is preferably made of aluminum profiles, and has the advantages of light weight and convenience in extrusion forming. Also, a via 300 may be provided in the center tunnel 3 to facilitate the arrangement of vehicle lines.

In addition, in the vehicle width direction, the present embodiment is also provided with a seat mounting cross member 17 arranged along the vehicle width direction, and the seat mounting cross member 17 is connected to both sides of the center tunnel 3, respectively, and is also fixedly connected to the front floor panel 15. Through setting up seat installation crossbeam 17, not only be convenient for the installation of vehicle seat, moreover, because be connected of seat installation crossbeam 17 and well passageway 3 both sides, can effectively promote the overall structure intensity at automobile body middle part.

As shown in fig. 1, as a preferred embodiment, the present embodiment is provided with a reinforcement beam 14 on top of the front end of the side frame 1, the reinforcement beam 14 is arranged in the vehicle width direction, and the reinforcement beam 14 is configured to be provided corresponding to the rear end of the front cabin side member at the front portion of the vehicle body, so that it is possible to form a block against the movement of the front cabin side member in the vehicle rear direction.

By arranging the reinforcing beam 14, the supporting strength of the front part of the frame 1 can be improved, in addition, in the whole automobile body, the height of a common cabin longitudinal beam relative to the frame 1 is slightly higher, the reinforcing beam 14 and the cabin longitudinal beam can be arranged at the same height, the force transfer from the cabin longitudinal beam to the middle structure of the automobile can be kept smooth, and the risk that the cabin longitudinal beam is lifted upwards when the cabin longitudinal beam is higher than the battery pack structure and collides can be reduced.

As shown in fig. 6 and 7, in the present embodiment, the front end of the frame 1 has a straight portion 130 extending in the vehicle width direction, and inclined portions 131 respectively connected to both sides of the straight portion 130. Each inclined portion 131 is disposed to be outwardly inclined in a direction toward the rear of the vehicle; accordingly, the reinforcing beam 14 includes a middle beam 140 connected to the top of the straight portion 130, and end beams 141 connected to the top of the inclined portions 131, respectively. The provision of the inclined portion 131 effectively avoids parts such as the wheel and its fender liner. And based on the shape arrangement of the front end of the frame 1, the reinforcing beam 14 is designed to be a middle beam 140 located in the middle and end beams 141 located at both ends to be connected with the tops of the straight portion 130 and the inclined portion 131, respectively, so that the matching degree and the integral connection strength of the reinforcing beam 14 and the frame 1 can be improved.

The middle beam body 140 of the present embodiment is preferably made of aluminum profile; meanwhile, as shown in fig. 1, a through hole 142 may be further provided in the middle beam 140 to facilitate the penetration of a pipeline. As shown in fig. 7, a cavity 144 may be formed in the middle beam 140 to reduce the weight of the reinforcement beam 14. In addition, the middle beam body 140 is made of aluminum profiles, has the characteristic of being convenient for extrusion molding, and has enough strength.

In addition, in the present embodiment, the top of the end beam 141 is also a slope 143 that is gradually lowered in a direction away from the middle beam 140. The top of the end beam body 141 is designed to be a gradually lower inclined plane 143, and can be connected with the top of the frame 1 into a whole, so that the overall shape regularity of the reinforcing beam 14 and the frame 1 is improved, and the installation and the arrangement of adjacent parts such as vehicle body sheet metal parts are facilitated.

In order to facilitate the connection between the vehicle chassis structure and the vehicle body front and rear structure of the present embodiment, in the present embodiment, as shown in fig. 8 and 9 in combination with fig. 10 to 12, the front end and the rear end of the frame 1 are respectively connected with the connecting members 18, and the connecting members 18 at each end are two connecting members respectively arranged near the two sides of the frame 1; each link 18 is provided with a subframe connection portion 180 for fastening to a subframe, and a vehicle body connection portion 181 for fastening to a front structure 193 or a rear structure 194 in the vehicle body.

The connecting member 18 can be fixed on the frame 1 as the battery pack case by welding, riveting, etc. Of course, as shown in fig. 12, the connection member 18 and the battery pack case may be fixedly connected by the connection bolt 187 in the preferred manner of this embodiment. In addition, when connecting, the inner portion 185 of the connecting member 18 abuts on the straight portion 130 of the frame 1, and the outer portion 186 abuts on the inclined portion 131 of the frame 1. The connecting member 18 is detachably connected to the battery pack case by means of a detachable connection means such as a screw connection, so that the connecting member 18 is detachably connected to the battery pack case, thereby facilitating the separate manufacturing of each component and the replacement and assembly of damaged components.

As shown in fig. 10, 11 and 12, the connecting member 18 is provided with two body connecting portions 181 for connecting with the front structure 193 or the rear structure 194, and a subframe connecting portion 180 for connecting with the front subframe 191 or the rear subframe 192. Mounting sleeves 182 provided in the connecting members 18 may be used at the subframe connecting portions 180 and/or the body connecting portions 181 to connect the respective members in cooperation with bolts.

The connection of the connecting member 18, the subframe and the front and rear body structures is performed at the subframe connecting portion 180, the body connecting portion 181, and the like by providing the mounting sleeve 182, which is advantageous for improving the connection strength and reliability.

In this embodiment, the connecting member 18 may be made of forged steel, cast iron, aluminum alloy, or the like, and preferably, the connecting member 18 of this embodiment is made of aluminum alloy by casting. Adopt cast aluminium spare, the manufacturing of being convenient for, and be favorable to vehicle structure lightweight design.

In addition, a plurality of weight-reducing cavities 183 are formed in the connecting member 18 based on the use of an aluminum casting, and reinforcing ribs 184 are provided in the weight-reducing cavities 183. The weight reduction cavity 183 and the reinforcing rib 184 are arranged in the connecting piece 18, so that the self weight of the connecting piece 18 and the manufacturing cost can be effectively reduced under the condition that the sufficient connecting strength of the connecting piece 18 is ensured.

In the embodiment, the connecting piece 18 is arranged between the middle part and the front and rear parts of the vehicle body, the connecting piece 18 is fixedly arranged on the battery pack shell integrated with the vehicle body, and the auxiliary frame connecting part 180 and the vehicle body connecting part 181 on the connecting piece 18 are respectively connected with the auxiliary frame and the front and rear parts of the vehicle body, so that the integrated connection of a plurality of vehicle body structural components on the connecting piece 18 can be realized, the integrated design of a connecting structure is facilitated, and the connection assembly of a vehicle main body structure is facilitated.

The vehicle chassis structure of this embodiment is through constructing the vehicle chassis for the form of integrated battery package casing, is favorable to simplifying the assembly structure of automobile body middle part below, simultaneously, sets up connecting piece 18 between the frame 1 of battery package casing and sub vehicle frame, can conveniently carry out the connection installation of preceding sub vehicle frame 191 and back sub vehicle frame 192 on battery package casing for the chassis structure becomes firm integrative structure, and is favorable to promoting the reliability on chassis.

Example two

The invention relates to a vehicle, namely the vehicle chassis structure provided by the first embodiment.

Moreover, the vehicle of the present embodiment defines the battery module mounting space 16 by the side frame 1 and the front floor panel 15, so that the side frame 1 serves as a vehicle body frame structure and a side housing of the battery pack, which is advantageous for simplifying the assembly structure below the middle of the vehicle body. Meanwhile, the frame 1 is simultaneously connected with the middle channel 3, the front floor panel 15, the connecting piece 18 and other parts, so that the overall strength of the middle structure of the vehicle body can be improved, and the assembly between the middle structure and the front structure and the rear structure of the vehicle body is facilitated.

In addition, it should be emphasized that the frame 1 is made of extruded aluminum profile and is annular to form a force transmission ring structure, so that the overall structural strength of the frame 1 can be improved. Meanwhile, the frame 1 of the embodiment is integrally extruded and formed, and the integral extrusion forming has higher strength than the existing split splicing, so that the structural strength of the frame 1 can be greatly increased.

At the same time, this embodiment also enables the formation of force transmission channels in the battery pack housing, again in cooperation with the arrangement of the cross and longitudinal interwoven center channels 3 and seat mounting cross members 17. Therefore, the force transmission network jointly formed by the annular frame, the middle channel 3 in the annular frame and the seat mounting cross beam 17 can absorb the collision force by utilizing the structural characteristics of the aluminum profiles when a vehicle collides, and can effectively disperse and transmit the collision force, particularly the side collision force, so that the collision safety of the middle part of the vehicle body is improved.

The two ends of the frame 1 are provided with inclined parts and are in a cone-shaped structure pointing to the head or the tail of the vehicle, so that the embodiment can also be beneficial to the transmission of the collision force from the front part or the rear part of the vehicle body to the doorsill beam parts at the two sides, and the deformation of the middle position of the vehicle body, namely the driving cabin part, can be reduced in the collision process by combining the middle channel 3, and the collision safety is improved.

This embodiment can avoid the battery package heat to scatter outward through set up thermal insulation material in frame 1, and the preceding floor panel 15 of the alloy material that and rethread generally adopts to have better heat transfer performance, alright when the cold season car for the battery package heat is transferred to driving the passenger compartment through preceding floor panel 15. Therefore, the battery pack positioned at the bottom of the driving cabin can form a structure similar to a floor heating structure so as to improve the ambient temperature in the vehicle, and the heating energy consumption of the air conditioner can be reduced, so that the reduction of the energy consumption of the whole vehicle is facilitated.

Furthermore, in the present embodiment, since the top of the battery pack case is recessed, a material having good heat conductivity may be provided on the front floor panel 15, so that the heat of the battery pack can be better transferred to the cabin. In this case, the heat transfer material may be, for example, a graphene material, and specifically, an existing graphene plate may be used, and a carpet may be laid on the heat transfer material.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims

1. A vehicle chassis structure characterized in that:

the vehicle-mounted battery pack comprises a battery pack shell positioned in the middle and integrated with a vehicle body, and a front auxiliary frame (191) and a rear auxiliary frame (192) which are respectively connected to the front end and the rear end of the battery pack shell;

the battery pack shell is provided with a ring-shaped frame (1) and a front floor panel (15) connected to the inner side of the frame (1), a battery module installation space (16) is limited by the frame (1) and the front floor panel (15), the front end and the rear end of the frame (1) are respectively connected with a connecting piece (18), and the front auxiliary frame (191) and the rear auxiliary frame (192) are connected with the frame (1) through the connecting pieces (18) corresponding to the ends.

2. The vehicle chassis structure according to claim 1, wherein:

the battery module installation space (16) is located below the front floor panel (15), a middle channel (3) arranged along the length direction of the vehicle body is arranged on the front floor panel (15), and two ends of the middle channel (3) are connected with the front end and the rear end of the frame (1) respectively.

3. The vehicle chassis structure according to claim 2, wherein:

a through hole (300) which is arranged along the length direction of the middle channel (3) and is used for a wiring harness and/or a pipeline to pass through is arranged in the middle channel (3); and/or, front floor panel (15) are less than the top setting of frame (1), the front end of frame (1) all is equipped with recess (13) with the top of rear end, the both ends of well passageway (3) link firmly respectively in rather than corresponding in recess (13).

4. The vehicle chassis structure according to claim 2, characterized in that:

and a seat mounting beam (17) is arranged on the front floor panel (15), and the seat mounting beam (17) is connected with the frame (1) and the middle channel (3) respectively.

5. The vehicle chassis structure according to claim 4, wherein:

at least one of the frame (1), the middle channel (3) and the seat mounting cross beam (17) is made of aluminum profiles.

6. The vehicle chassis structure according to claim 1, wherein:

the frame (1) is provided with a hollow inner cavity, and a heat-insulating and sound-insulating material is filled in the inner cavity; and/or the top of the front floor panel (15) is paved with a heat transfer material.

7. The vehicle chassis structure according to claim 1, wherein:

the frame (1) has the straight section part (12) of establishing in both sides separately, straight section part (12) extend along automobile body length direction, and both sides straight section part (12) constitute the threshold roof beam in the automobile body.

8. The vehicle chassis structure according to claim 1, wherein:

the top of the front end of the frame (1) is provided with a reinforcing beam (14), the reinforcing beam (14) is arranged along the width direction of the vehicle body, and the reinforcing beam (14) is configured to be arranged corresponding to the tail end of a front cabin longitudinal beam in the vehicle body, so that the front cabin longitudinal beam can form a barrier to move towards the rear direction of the vehicle.

9. The vehicle chassis structure according to claim 8, wherein:

the front end and the rear end of the frame (1) are respectively provided with a straight line part (130) extending along the width direction of the vehicle body and inclined parts (131) respectively connected to two sides of the straight line part (130), and each inclined part (131) is arranged in a mode of outwards inclining along the direction far away from the straight line part (130);

the reinforcing beam (14) includes a middle beam body (140) connected to the top of the straight portion (130) at the front end, and end beam bodies (141) connected to the top of the inclined portions (131) at the front end, respectively.

10. The vehicle chassis structure according to claim 9, wherein:

the top of the end beam body (141) is an inclined surface (143) which is arranged along the direction far away from the middle beam body (140) and is gradually lowered.

11. The vehicle chassis structure according to any one of claims 1 to 10, wherein:

the connecting pieces (18) at each end are two connecting pieces which are respectively arranged close to two sides of the frame (1), and each connecting piece (18) is provided with a vehicle body connecting part (181) which is fixedly connected with a front structure (193) or a rear structure (194) in a vehicle body.

12. The vehicle chassis structure according to claim 11, wherein:

the connecting piece (18) is detachably connected to the frame (1); and/or the connecting piece (18) is formed by casting aluminum alloy, a plurality of weight reducing cavities (183) are formed in the connecting piece (18), and reinforcing ribs (184) are arranged in the weight reducing cavities (183).

13. A vehicle, characterized in that:

the vehicle having the vehicle chassis structure of any one of claims 1 to 12 therein.